Study on dynamic behavior of pile under seismic motion

在本研究中，旨在阐明什么样的地震运动破坏了地面上的桩。此外，通过1999-2000年2年的研究，利用试验结果和分析方法，对静力和抗震设计方法进行了检验。研究项目及摘要如下：桩的承载力生成：采用二维装置与铝棒体模拟非粘性地基。试验是在松散和致密的地面条件下进行的。研究了桩宽、桩长对埋深的影响。试验结果对渐进式破坏机理进行了全面的观察。桩与挡土墙的震害抗震性能：收集并整理了神户地震中桩与挡土墙的震害情况。生产冲击装置，产生1G以上的冲击垂直运动：通过生产该装置，砂浆试件冲击压缩和拉伸实验成为可能。为了阐明上下冲力的断裂机理，目前正在进行基础实验研究。

In this study, it intends to clarify that what kind of seismic motion destroys piles in the ground. In addition, both static and seismic design method are examined by using the experimental results and analytical approach through the 2year's research, 1999-2000.The research item and abstract are as follows :Bearing capacity generation of pile : A two dimensional apparatus was used with aluminum rod mass simulating the non-cohesive ground. The tests were performed with lose and dense condition of the ground. Effect of pile width and length of embedment were studied. Test results bring out a comprehensive observation of the progressive failure mechanism.Seismic damage seismic behavior of piles and retaining walls : The seismic damage of the piles and the retaining walls at Kobe earthquake is collected and is arranged of the case variously.Production of impact apparatus, gives over 1G impact vertical motion : By production of this apparatus, mortar test-pieces shock both compression and tension experiment possible. Now the basic experimental research is tackled for the elucidation of fracture mechanism by up-down impulsive force.